Security Snapshot

Magnera Corp - Common Stock (MAGN) Institutional Ownership

CUSIP: 55939A107

13F Institutional Holders and Ownership History from Q3 2024 to Q1 2026

Latest Period

Q1 2026

Institutions Reporting

172

Shares (Excl. Options)

36,546,113

Price

$9.51

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Security type / class
Equity / Common Stock
Symbol
MAGN on NYSE
All holders as of 31 Mar 2026
Q1 2026
Total 13F shares
36,546,113
Latest holder snapshot 5 signals
Total 13F value
$347,079,590
Portfolio coverage rank
0%
Share change
-848,282
Value change
-$22,128,934
Number of holders
172
Issuer context Names, identifiers, and filing context for this profile. 3 identity fields
Shares outstanding
35,844,156
SEC-reported price per share
$10.37
Insider filing price
$10.37
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors

Key facts

  • MAGN - Magnera Corp - Common Stock is tracked under CUSIP 55939A107.
  • 172 institutions reported positions in Q1 2026.
  • 6 significant owners is listed from Schedule 13D/13G reporting.

Change

  • Holder count moved from 186 to 172 between Q4 2025 and Q1 2026.
  • SEC-reported value moved from $567,024,194 to $347,079,590.

Research use

  • You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
  • 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.

Evidence

Source: SEC Form 13F

Latest holder context comes from 172 institutions filings for Q1 2026.

Open SEC evidence

Security key

55939A107

Latest holder period

Q1 2026

13F holders

172

13D/G owners

6

CIK / CUSIP context first

Open Q1 2026 holders MAGN full holder history Magnera Corp SEC filings Magnera Corp company facts Magnera Corp insider transactions

Broader feeds

Latest 13F filings Latest 13D/G filings All securities

13D/G owners

Significant owners

Large-stake holder rows connected to Schedule 13D/G evidence.

Rows
6
Security
MAGN
Filer Ownership Change % Holdings Value Net Change Nb Shares Change % Reporting Name Report Period
Newtyn Management, LLC 7.7% +22% $26,247,600 +$4,645,635 2,760,000 +22% Newtyn Management, LLC 31 Mar 2026
BlackRock, Inc. 7.1% $30,433,104 2,519,401 BlackRock, Inc. 30 Jun 2025
Cetus Capital VI, L.P. 6.3% -20% $21,328,125 -$5,337,763 2,242,705 -20% Cetus Capital VI, L.P. 31 Mar 2026
MORGAN STANLEY 5.3% -17% $17,994,356 -$4,095,415 1,892,151 -19% Morgan Stanley 31 Mar 2026
Madison Avenue Partners, LP 4.4% -12% $15,126,758 -$1,807,214 1,590,616 -11% Madison Avenue International LP 31 Mar 2026
Ancora Advisors LLC 1.5% -77% $8,072,058 -$20,442,255 533,161 -72% Ancora Advisors LLC 31 Dec 2025

As of 31 Mar 2026, 172 institutional investors reported holding 36,546,113 shares of Magnera Corp - Common Stock (MAGN). This represents 102% of the company’s total 35,844,156 outstanding shares.

13F concentration

Top 25 institutional shareholders

Largest 13F positions for this security by reported shares and value.

Top holder share
77%
Institution Ownership % Shares Held Share Change % Portfolio % Holdings Value
Newtyn Management, LLC 7.7% 2,760,000 +17% 2.8% $26,247,600
LITTLEJOHN & CO LLC 6.8% 2,425,818 -6.5% 22% $23,069,529
BlackRock, Inc. 6.7% 2,390,007 +0.59% 0% $22,728,968
Engine Capital Management, LP 6.3% 2,243,827 0% 2.6% $21,338,795
MORGAN STANLEY 5.5% 1,967,831 -19% 0% $18,714,085
Madison Avenue Partners, LP 4.4% 1,590,616 -11% 0.66% $15,126,758
VANGUARD CAPITAL MANAGEMENT LLC 4.3% 1,533,277 0% 0% $14,581,464
DG Capital Management, LLC 3.4% 1,207,356 +3183% 5% $11,481,956
Diameter Capital Partners LP 3.4% 1,205,793 0% 2.2% $11,467,091
D. E. Shaw & Co., Inc. 2.5% 896,215 +11% 0.01% $8,523,005
JPMORGAN CHASE & CO 2.3% 828,799 +230% 0% $7,426,040
CANYON CAPITAL ADVISORS LLC 2.3% 810,000 0% 1% $7,703,100
GEODE CAPITAL MANAGEMENT, LLC 2.2% 780,258 +4.6% 0% $7,422,246
Assenagon Asset Management S.A. 2.1% 742,425 0% 0.01% $7,060,462
Clearline Capital LP 2.1% 738,317 +12% 0.55% $7,021,395
Ancora Advisors LLC 2% 721,090 +69% 0.15% $6,857,565
STATE STREET CORP 1.8% 656,868 +2.5% 0% $6,246,815
JB CAPITAL PARTNERS LP 1.8% 655,000 +27% 1.1% $6,229,050
THOMPSON SIEGEL & WALMSLEY LLC 1.6% 574,264 0.1% $5,461,000
JACOBS LEVY EQUITY MANAGEMENT, INC 1.5% 524,890 -33% 0.02% $4,991,704
AMERIPRISE FINANCIAL INC 1.4% 508,525 -2.2% 0% $4,836,073
Russell Investments Group, Ltd. 1.4% 507,447 +38% 0.01% $4,825,821
CHARLES SCHWAB INVESTMENT MANAGEMENT INC 1.3% 453,697 +13% 0% $4,314,658
Verition Fund Management LLC 1.2% 432,303 +31% 0.04% $4,111,202
ALGERT GLOBAL LLC 1.1% 393,615 +35% 0.06% $3,743,000

Quarter history

Institutional holders across reporting periods

Holder count, reported shares/value, and median price by quarter.

Periods
7
Latest
Q1 2026
Rows shown
1-7 of 7
Period 13F Shares, Excl. Options Value, Excl. Options Value Change Price (Median) Investors
2026 Q1 36,546,113 $347,079,590 -$22,128,934 $9.51 172
2025 Q4 37,451,836 $567,024,194 +$17,241,151 $15.14 186
2025 Q3 36,750,467 $430,715,387 -$35,491,046 $11.72 173
2025 Q2 39,691,539 $479,478,188 +$30,588,844 $12.08 182
2025 Q1 35,171,630 $638,750,519 +$3,666,137 $18.16 210
2024 Q4 34,978,922 $635,557,524 +$627,755,115 $18.17 227
2024 Q3 142,295 $725,642 +$725,642 $9.50 4
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